Fork cartridge Matris F15K for BMW F 650 GS 08-12 (fork type Showa) / (the kit keeps the original spring set) - (Supplied without springs)

F15K, the “quad-valve” basic cartridge
The kit is supplied with specific high sliding fluid.
The F15K sets a new standard & quality level on the market.
It is an asymmetrical hydraulic cartridge kit that completely replace the original internals of conventional non-adjustable forks converting them in fully-adjustable ones as in a sports fork type.
It is a kit intended for all the Street, Naked and Classic bikes equipped with conventional forks.
It houses the spring Preload and separate asymmetrical Compression and Rebound damping adjustments using the innovative “quad-valve system” that avoids the risk of fluid cavitation.
The F15K cartridge kit can be set-up much more accurately for each rider making the fork more precise, more adjustable, easier to use … better in every regard.
Every adjustment click makes a difference to the damping.
All components are made from Alu alloy with oxidation surface treatment to ensure long wear life.
The springs can be changed quickly without removing the forks from the bike
12 mm diameter pumping-rod made from Alu alloy with anti-friction lapping and hard oxidation surface treatment
Cartridge cylinder made from Alu alloy.
Lapped finish to grant an effectively “zero” friction and oxidation surface treatment
20 mm diameter Compression and Rebound valves, supported by oilless slide bearings, machined from Alu alloy billet, with specific shims set and flow dynamics specially designed for hydraulic damping control
It is fully and easily overhaul for proper and regular maintenance.